Brick-machine



(No Model.)

G. CAMPBELL.

I BRICK MACHINE. N0. (25,2012. k Patented Dec. 25, 1888.

llniTnn STATES PATENT Trice.

GARDINER CAMPBELL, OF MILWAUKEE, \VISCONSIN.

BRICK-MACHINE.

SPECIFICATION forming part of Letters Patent No. 395,212, dated December 2 5, 1888.

Application filed February 4, 1888. Serial No. 263,023, (No model.) I

To all 2072,0712 it may concern:

Be it known that I, GARDINER CAMPBELL, of Milwaukee, in the county of Milwaukee and State of \Visconsin, have invented new and useful Improvements in Brick-Machines; and I do hereby declare the following to be a full, clear, and exact description of said invention, reference being had to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in brick-machines; and it pertains to the device by which the brick-forming molds are forced forward into the clay-receptacle of the machine preparatory to being filled with clay. As the molds are being forced forward into the machine, it often occurs that they are brought in contact with a stone or other obstruction, which will stop the reciprocating carriage by which the molds are thus moved,

in which case the molds or some part of the,

machine is thereby frequently broken.

The object of my invention is to provide a safety device to be used in connection with the operating-levers which for ordinary work will permit such levers to force the molds into the clay-receptacle; but whensuch molds are brought in contact with an obstruction, which would otherwise break the machine, the operating-levers are caused by such safety device to be automatically thrown out of operative contact and the operating-levers permitted to move on without moving the molds or the reciprocatin g carriage until such obstruction is removed, when the levers will again be automatically thrown into operative contact, and motion will again be communicated through them to the molds.

The construction of my invention further explained by reference to the accompanying drawings, in which-- Figure 1 represents a side view of a brickmachine with part broken away, showing the device for communicating motion to the molds. Fig. 2 represents an end view of the machine shown in Fig. 1. Fig. 3 is a detail showing the safety mechanism referred to, by which the mold-carriage is operated, in position for work. Fig. 4 represents the same mechanism as that shown in Fig. 3, with the parts thrown Fig. 5 is a detail out of operative contact.

pin Qand showing an enlarged view of the its bearing-surface.

Like parts are represented by the same reference-letters throughout the several views. Motion is communicated to the grinding mechanism of the machine from a motive power (not shown) through the band-wheel A, shaft B, beveled gears (l and I), and shaft E, in the ordinarymanner, and from the shaft E motion is communicated to the molds F through the beveled gears G and H, shaft 72, crank I, pitman J, crank K, shaft L, arm M, weighted lever N, and reciprocating carriage 0, whereby with each revolution of the shaft h said reciprocating carriage O is moved forward and away from and backward into the clay-receptacle E of the machine. \Vith machines as ordinarily constructed, when the molds F meet with any obstruction some part of the operative mechanism thus described, which communicates motion, from the bandwheel A to the reciprocating carriage, is broken or injured.

My improvement consists more especially in the peculiar form of device by which the vibrating arm M is connected with the weighted reciprocating lever N, and which is more clearly shown in Figs. 3 and l. The lever N is provided with a recess, P, formed at an angle to its line of motion, for the reception of the connecting bolt or pin Q, and with a weight, R,which holds said lever down upon said bolt Q with sufficient force to prevent said lever from being thrown up and disengaged from said pin by any ordinary resistance to the molds. hen, however, the molds meet with great resistance as they are being forced into the clay-receptacle toward the right, as inclicated by the arrow in Fig. 3, said lever N, with its weight R, will be thrown upward by contactof the pin Q with the upper side of the angular recess P, whereby said vibrating arm M is disengaged from said lever N, and is permitted to oscillate freely against the under side of the lever N, as shownin Fig. 4, without communicating any motion whatever to said lever N or the carriage 0, connected therewith, and consequently said lever N is permitted to remain at rest until the machine can be stopped and the obstruction removed from the molds. The resistance of the bear ings of the recess P to the pin Q is increased and diminished either by the size of the weight R or by moving said weight nearer to or farther from the free end of said lever N, whereby the degree of resistance of the connecting mechanism between the pin Q and the lever N is readily adjusted to conform to the resistance of the molds in entering the clay-receptacle, so that when the molds meet with a greater resistance than can be safely sustained by them or the operative mechanism of the machine, said weight R is thrown up with the lever N, and the lever N is disengaged from said arm M, as mentioned. The lower side of the lever N is provided with a retaining-keep er, A, beneath the pin or bolt Q, and said lever is connected with the carriage O by a pivotal bolt, B, which permits of the upward and downward movement of the opposite end of said lever N, as may be required to conform to the circular movement of the arm M. The carriage O and the mechanism for support ing it and the molds are of the ordinary construction and form no part of my present invention.

T0 diminish the wear between the bearing surfaces of the pin Q and the sides of the recess P, said pin Q is provided with a broad bearing-surface, a, conforming in shape to the bearing-surface of the recess P, and the ends of the pin Q are loosely fitted in their bearings in the arm M, so as to permit of the swinging motion of the arm M without turning said pin Q against its bearing-surface in the recess P, thus avoiding the friction and wear that would otherwise occur with a fixed or stationary bearing.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent,is

1. In abrick-machine, the lever N, )rovided with a recess, P, for the reception of the pin or bolt Q, through which motion is communicated to said lever from the vibrating arm M, in combination with the reciprocating moldcarriage O and said vibrating arm M, said recess P being formed at such an angle to its line of motion as to permit the bolt operating therein when unduly resisted to be automatically disengaged therefrom, substantially as and for the purpose specified.

2. In a brick-machine, the combination of the carriage O, lever N, pivoted at one end to said carriage O and provided with an angular recess, P, keeper A, weight R, vibrating arm M, connected with the operative mechanism of the machine, and pin or bolt Q, attached to the free end of said arm M and adapted to engage in said recess P, all substantially as and for the purpose specified.

In a brick-machine, the safety mechanism consisting in the combination of the vibrating arm M, pin Q, loosely fitted in its bearin gs in said arm M and provided with a broad bearing-surface, a, conforming in shape to the contiguous bearing-surface of the lever N, and lever N, provided with a recess or bearingsurface for the pin Q, substantially as and for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

GARDINER CAMPBELL.

\Vitnesses:

Ms. B. ERWIN, GEORGE G. CAMPBELL. 

